Study Of The Digital If Software Radio Receiver

The software-defined radio technique is a kind of new lead-incommunication technique, Caused the technical innovation of receiver. Bymeans of the software-defined radios,It is better to make the A/D,D/Acloser to the antenna,and processing the signal in the digital domain.any communication function will be performed in the same hardware platform.To realize different function by choose different block of software.software-defined radio can communicate with the station of old systembecause it can form all kinds of modulate undee and protocol,this canprolong the cycle of the station and so reduce the cost, So thesoftware-defined radio has a bright foreground in the communication field,especially in the mobile communication field. Due to the limitation ofdevice level,It is impossible to sample RF signal . So it is a valid wayto sample IF signal to realized the software-defined radio receiver.This paper first discuss the base conception and specialty of thesoftware-defined radio , Analyze the base three framework of thesoftware-defined radio. discuss the realize method of the receiver.Provided a way for realized digital IF sample software radio receiver.The study of this paper places emphasis on the block of signal processingin the IF and the block of base band signal processing. And gives specialdetails of algorithm analysis and realized techniques in ADC,DDC andFPGA. establishes an digital IF Soteware Radio framework.